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Design of Integrated Circuit to Extract Energy from Piezoelectric Devices

Maghsoudi, Pedram | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 55692 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Sharifkhani, Mohammad
  7. Abstract:
  8. Energy harvesting from wasted environmental energy to power low-power electronic devices has emerged as an enabling technology for wireless applications in the past decade. The purpose of this technology is to provide remote power sources and/or recharge storage devices such as batteries and capacitors. This concept has environmental implications in reducing chemical waste produced by replacing batteries and potential monetary benefits that also reduce maintenance costs.Energy harvesting (EH) from untapped natural energy sources is common nowadays due to the increasing demand for electricity. Sources have the potential to generate micro to milliwatt power, depending on environmental conditions.The use of piezoelectric elements to harvest energy from environmental vibrations has been of interest for several decades, which became possible due to the discovery of the piezoelectric effect in 1880.A piezoelectric sensor is a device that uses the piezoelectric effect to measure changes in pressure, acceleration, strain, or force by converting them into an electrical charge. Although piezoelectric sensors are electromechanical systems that react to compression, the sensor elements exhibit almost zero deflection.In this thesis, the goal is to fully and accurately implement an energy harvesting circuit that uses the energy of the human body as a source and produces power for us at the output. In this circuit, three new circuits are designed, including the piezoelectric input circuit. which causes a significant reduction in the amount of capacitors used, and the LDO circuit in the output, which makes the main circuit not need a battery and is self-starting, and also the design of a rectifier circuit to the transistor, which will reduce the voltage loss in the output Also, the open circuit voltage of the input piezoelectric element has increased significantly compared to the last work, and the input capacitor has also decreased, and the output voltage, current, and power have reached milliwatts, and the efficiency of the entire circuit is significantly better than the last work
  9. Keywords:
  10. Energy Harvesting ; Power ; Piezoelectric Energy Harvester ; Efficiency ; Low Drop Out (LDO)Regulator Circuit ; Wireless Applications ; Human Body Energy ; Generated Voltage and Current ; Rectifier Circuit ; Environmental Vibrations

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